And the new costumes haven;t messed up the old design.
Lis Sladen had said they were the ones she most wanted back for SJA ("They were the only monsters that looked good from the back as well") but knew she wouldn't get them till after Doctor Who had paid to build the new costumes...

PS: Havign said that, they are a bit boring aside from the great design, just an amalgam of several obvious Who tropes: warlike aliens+shapeshift and replace humans+own planet destroyed and need another one+origin of a great Earth legend. So basicalkly, the sort of enemy the Doctor knocks off when he wants a quiet afternoon, and likely to only be the catspaw for the real villain.

They are a great design and the shapeshifting made for some very tense moments but the Zygons back story is pretty much Who at its most generic. Once they were in Zygon form they were just your average Who ranting alien baddies.

That said I'm glad to see them back - nice to have something different for once. I presume this is the reason Terror's dvd release has been pushed back to later in the year.

Oh... wodner how the body printing works with a TIme Lord? If they had one Doctor as a base, could they imitate his earlier incarnations? Or would the body print be maybe slightly downgraded, not quite accurate?